Headset



FIG. 1 is a front perspective view of the headset.

FIG. 2 is a rear perspective view thereof.

FIG. 3 is a front plan view thereof.

FIG. 4 is a side view thereof.

FIG. 5 is the other side view thereof.

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines form no part of the claimed design. 

The ornamental design for a headset, as shown and described. 